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对4片配筋率相同但灌孔率和砌筑方法(错缝砌筑和同缝砌筑)不同的N式砌块配筋砌体剪力墙进行了低周反复荷载试验,研究了墙体的破坏模式、承载力、滞回特性、延性等抗震性能指标。试验结果表明:相比于普通混凝土小砌块砌体配筋墙体,错缝砌筑和同缝砌筑的N式砌块配筋砌体剪力墙都表现出更高的斜截面承载力,且砌块剪力墙的破坏形态与现浇钢筋混凝土剪力墙相似,破坏时受拉纵筋屈服,角部砌块与灌孔混凝土压碎;墙体的承载力随着竖向荷载的降低而降低,但墙体的延性随着竖向荷载的降低而增大;墙体发生受弯破坏时,裂缝细而多,破坏时裂而不倒,具有良好的承载能力、刚度、延性性能以及耗能能力;墙体抗震性能明显优于普通砌块配筋砌体剪力墙。
Low-cycle repeated loading tests were carried out on four N-type reinforced concrete masonry shear walls with the same reinforcement ratio but different hole filling rates and masonry methods (staggered and masonry) Body failure mode, bearing capacity, hysteresis characteristics, ductility and other seismic performance indicators. The experimental results show that compared with ordinary concrete masonry reinforced concrete masonry walls, both the staggered-seam masonry and N-type masonry reinforced masonry shear walls with the same masonry show higher bearing capacity of oblique section , And the failure mode of the block shear wall is similar to the cast-in-situ reinforced concrete shear wall. When the failure is under tension, the longitudinal reinforcement will yield and the corner block and the grouting concrete will crush. The bearing capacity of the wall increases with the vertical load And the ductility of the wall increases with the decrease of the vertical load. When the wall is subjected to bending failure, the cracks are thin and numerous, the fracture does not collapse when the wall is broken, and has good bearing capacity, stiffness and ductility As well as energy-dissipating ability. The seismic performance of the wall is obviously better than the ordinary block reinforced masonry shear wall.